Automatic leaf turner



Nov. 30., 1926. 1,609,144 M. V. VENTRELLA AUTOMATI C LEAF TURNER Filed May 29 925 INVENTOR' MickaelYIn/mlla BY W fim EY books. in which the book is supported by a Patented Nov. 30, 1926.

UNITED-"STATES.

' M'ICI-IAEL v. VENTRELLA, or BRONX, new roan.

: An'roMArIo LEAF. TURNE Application filed May 29, 1925. Serial No. 33,618.

This invention relates to improvements in automatic lea-f turners for the leaves of books, particularly music books, and 1t is the principal object of the invention to provide a device of this character in which a foot operated, articulated finger engages pockets formed'on the leaves of the book and turns the samewhen returned into its origi- .making its operation noiseless, and provided with means for limiting its movements.

Astill further object of the invention 'is the ,provision of a leaf turner for music books including a finger and a cam guide for the same, sai'd fingerbeing attached to a drum which is fadjustably connected to the treadle.

It is also one of; the objects of the present.

invention to provi'de'a music leaf turner for shelf carried by an adjustable plate.

These and other objects and advantages of my invention will become more fully apparent, as the description thereof proceeds, and

- will then be more specifically defined; in the appended claims.

In the accompanying drawing forming a material part of this disclosure:

Fig. 1 is a front elevation of a music stand equipped with a turner for the leaves of a book of-music mounted thereon, constructed according to the present invention.

Fig. 2 is a side elevation thereof.

Fig. 3 is an enlarged detail view of the cam faced housing, drum and finger thereon.

Fig. 4 is a section on line 4--4 of Figure 5.

F i 5 is a sectional top plan view seen in the direction of the arrows 55, Figure 4.

Fig. 6 is a rear end view of the music book support, seen in the direction of the arrows 66 of Figure 2.

Fig. 7 is a detail view of a book of music having the pockets attached thereto.

Fig. 8 shows in sectional view one of the pockets.

Fig. 9is a front elevation of a pocket.

Fig. 10 is a detail view of the developed cam outline in the drum housing.

PATE T OFFICE? The hollow music stand 10 is supported by 'folda'b'le legs 11 and movable links 12 attached to a collar 13., 'lVithin the stand a" rod 14 is vertically 'displaceable which can be locked in any of its adjusted positions by means of a wing bolt 15. The rod 14 carries the usual, collapsible support or table 16 for the music book 17, the lower edge of which rests on a flange 18 of a support 19a'ttached to a plate 20 by means of buttons 21, adapted to engage recesses 22 in said plate.

This plate has a plurality ofholes 23, 24 and 25 formed with elongated endf slots therein through which pass buttons 26, or the like, of'the frameof the supportfor holding the plate firmly attached thereto, if

the buttons engage in the elongated 'end slots ofthe plate.

The frame bar 27 carries at its upper end,

a casing or housing 28'having an opening therein and formedin saidopening a cam face 29 constructed so as to present at one end of the sald opening, anupwardly disposed cam299, and at the other end of the said opening, a downwardly disposed cam 29 the housing on a pin 31, and has'anarm 32 hingedly mounted, asgenerally indicated at 30, on one side, this hinged joint being ger 33, normally held in aligned position with thesaid arm, by aspring' 34, whichallows a bending of the finger to one side.

A cable 35 is attached at one :e'ndtojthe drum and is guided over' a roller 36 in an opening of the housing and'over'a roller37 rotatably secured to an arm of plate 20. To the lower end of the cable, a chain 38 is attached the lower end of which is adjustably secured to a weighted foot pedal or treadle 39 pivotally attached on a frame 40 equipped with a padding 41 adapted to be engaged by a pad 42 on the underside of the treadle, while a bracket 43 limits the downward movement, its upper extension 43 limits the upward movement of the pedal.

A spring 44 is arranged within drum 30 and has one of its ends attached to pin 31 while its other end is attached, as at 45, to the boss in the drum.

The leaves of the book have pockets 46 glued thereto adapted to receive the finger A drum'30 is rotatably'arranged within 33. These pockets 46 are strengthened by bending the front part of the material upon itself within the pocket, as indicated at 47, in Figure 8.

The device operates as follows:

Normally spring 44 holds the drum 30 so positioned that the arm 32 is engaged at one end of the cam opening in the housing 28, namely the end formed with the upwardly disposed cam 29*. In this position the arm 32 is likewise upwardly inclined. If it is desired to turn one of the leaves of the book of 'music l'f, the pedal 39 is depressed by the foot, rotating the drum 30' by the intermediary of chain 38, and cable 35, so that the arm 32 of finger 33 is caused to glide non" the cam face 29. The finger 33 reaches the front face of the leaf of the book to be turned, and its motion is then arrested thereby, but'the drum continues its motion until'it reaches the end of the cam opening formed with the downwardly disposed cam 29*, and the spring 3 allows a bending so that the finger can remain stationary against the face of the'leaf, while the drum completes its motion. But in completing its motion the drumcauses the arm to be depressed downwardly due to contact with the downwardly disposed cam 293, and the finger engages into the pocket 46. The operator is now ready to turn the leaf at the appropriate time by releasing the pedal 39, whereupon spring 44 turns the drum 3 O't owards its norma'l'position, and at the same time the finger takes along the leaf to be turned, and near the end of the return stroke, the arm 32 engages the cam 29*, thereby lifting the finger upwards outof engagement from the pocket, and upon completion. of the return stroke, the device, is in its; original normal position.

It is to be understood that while I have shown and described the preferred form of my device, by way of example, any size book may be turned by my device. It will be understood that other such changes may be made, as fall within the scope of the appended claims, without departure from the hingedly mounted on said drum by 'means of a" frictiontight joint, a finger pivotally secured to the front end of said arm, normally held in alignment therewith b the action of a spring fastened'to one 0 said members and bearing against the other, and a spring. co-acting between said drumapd housing,normally urging said arm to the upwardly disposed camportio'n of said cam opening, whereby upon turning the against the action of saidlast mentioned spring, the said arm engages against the downwardly disposed cam, and turns said finger downwards, and upon releasing the drum the finger moves back to its original position. i

2. The combination, in a device of the class described, comprising a drum rotatably mounted in a housing'formed with a cam opening characterized by an upwardl dis-v posed eam portion at one end, anda ownwardly disposed cam portion at the other end, an arm hingedly mounted on said drum by means of a frictiontight joint, a finger pivotally secured to the front end of said arm, normally held in alignment therewith by the actionof a spring fastened to one of said members and bearing against the other, whereby upon rotating the drum the motion of the fingermay be arrested, permitting a fu'rther rota tion of' the drum so as to allow the said arm toengage the re spective cam portions.

In testimony whereof I have afiixed my signature. 1

MICHAEL v.- VENTRELLA. 

